K4COW
Active1x3District 4
Competitive callsign — 4 applications filed with the FCC.
License HolderKrumbein, Marc
License ClassGeneral
Min. Class RequiredGeneral
LocationAnnandale, VA
Grant DateMar 28, 2017
Expiration DateMar 28, 2027
K4COW is a highly sought-after 1x3 format amateur radio callsign. The license is currently held by Krumbein, Marc in Annandale, VA. This callsign has attracted significant interest in the amateur radio community, with 4 vanity applications filed with the FCC. The most recent was submitted by Pegues, Charles M on Mar 4, 2025. K4COW has 5 recorded FCC license history events.
CW & Voice Analysis
Morse Code
-.- ....- -.-. --- .--
CW Weight: 38 units(Moderate)
Voice Phonetics
Kilo Four Charlie Oscar Whiskey
Readability: 8/10(High readability)
License History
- License IssuedMar 28, 2017
- Vanity Callsign GrantedMar 28, 2017
- License ExpiredNov 1, 2016
- Tax ID (TIN) AddedAug 9, 2004
- License RenewedAug 9, 2004
Vanity Application Activity
Competing applications filed with the FCC for this callsign.